Furnace grate-bar



No. 425,199. Patented Apr. 8, 1890.

UNITED STATES PATENT OEEICE.

ARTHUR J. BAYLEY, OF MILWAUKEE, VISCONSIN.

SPECIFICATION forming part of Letters Patent No. 425,199, dated April 8, 1890.

Application filed December 9, 1889. Serial No. 333,052. (No model.)

To all whom it may concern,.-

Be it' known that I, ARTHUR J. BAYLEY, of

Milwaukee, in the county of Milwaukee, and in the State of Visconsin, have invented certain new and useful Improvements in Furnace Grate-Bars; and I do hereby declare that the following is a full, clear, and exact description thereof. My invention relates to furnace grate-bars; and it consists in certain peculiarities of construction, as will be fully set forth hereinafter, and subsequently claimed.

The drawing is a perspective view of one of said bars, partly broken away to better illustrate the construction.

A A represent the sides of the bar, having vertical exterior anges o, Ct, and B B are the ends thereof, said ends being of less depth than the intermediate portion of the sides. The top of the bar is all on the same plane.

C C C represent. a series of central longitudinal perforations, separated by solid portions b ZJ, and on each side thereof are series of oblique perforations D D c, extending from the sides A toward the center of the bar, the perforations D being the shorter and the perforations c being longer, and their inner ends extending into the solid portions between the adjacent ends of the longitudinal perforations C. The solid oblique portions d CZ of the bar, between the perforations D D and c at each side of the longitudinal center of the bar, are of less depth than that of the sides A A and of as great depth as, or greater depth than the ends B B of said bar, and the said oblique perforations D D and c o are arranged in pairs, like a series of Vs, interrupted at their bottom points by the central longitudinal line of the bar, and by making the inner ends of each pair of the oblique perforations c c nearer together than the corresponding ends of each pair of the oblique perforations D D, which are separated by the central longitudinal perforations C C, the result is that practically about the same quantity of solid metal is left between the adjacent ends or sides of all the perforations; and hence the contraction and eXpansion of all portions of the bar. is substantially equal, and the bar is stronger than if the side perforations were otherwise arranged than obliquely to the length, while at the same time the bar is one solid casting and free from the objection of an uninterrupted solid central longitudinal section, which is a construction heretofore tried and found objectionable from itsliability to crack under expansion and contraction, all liability to which is obviated by the numerous air-spaces provided for in my described arrangement.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

A furnace-bar consisting of a single cast-ing having sides and ends, and with its longitudinal central portion interrupted by a series of longitudinal perforations,and series of oblique perforations extending from the sides toward the central portion of the bar and arranged in pairs, certain of said oblique perforations being of greater length than the others and extending into the solid portions of the center of the bar between the central longitudinal perforations, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of VVisconsin, in the presence of two witnesses.

ARTHUR J. BAYLEY.

Witnesses:

H. G. UNDEEwooD, WM. KLUG. 

